Flat warts are also called juvenile warts because they're most commonly found in children and young adults. The warts are caused by a virus.
Because they appear in children more often than adults, flat warts are often referred to as juvenile warts. They usually develop in large clusters.
Kids and teens get more warts than adults because their immune systems Flat warts tend to appear on children's faces, men's beard areas, and women's legs.
Flat warts: This type of wart is more common in teens and children than in adults. Flat warts are smoother, flatter, and smaller than other warts.